System and methods for adjusting NH3 sensor drift

Methods and systems are provided for adjusting an ammonia (NH3) sensor output using readings of a nitrogen oxide (NOx) sensor, the NOx sensor having a sensitivity factor to NH3. In one example, a method may include determining and updating a gain value of the NH3 sensor during zero NOx conditions to...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	Kubinski, David, Yoo, In Kwang, Van Nieuwstadt, Michiel J
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING ENGINE PLANTS IN GENERAL GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION STEAM ENGINES TRANSPORTING WEAPONS
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	Methods and systems are provided for adjusting an ammonia (NH3) sensor output using readings of a nitrogen oxide (NOx) sensor, the NOx sensor having a sensitivity factor to NH3. In one example, a method may include determining and updating a gain value of the NH3 sensor during zero NOx conditions to be used to calculate a corrected NH3 sensor output value, and determining and updating an offset value of the NH3 sensor during zero NH3 conditions to be used to zero the NH3 sensor during zero NOx conditions.